which is the best way to complete the text? some features of earth that are visible from space are the…

Brief Explanations:

The phrase "Some features of Earth that are visible from space" is a complete - thought statement. The list of features (Himalayan mountains, Australia's Great Barrier Reef, and human - made islands off the coast of Dubai) is a non - essential appositive that needs to be introduced with a comma. "Some features of Earth that are visible from space, include the Himalayan mountains, Australia's Great Barrier Reef, and the human - made islands off the coast of Dubai" is incorrect as it makes the sentence ungrammatical. "Some features of Earth that are visible from space are; the Himalayan mountains, Australia's Great Barrier Reef, and the human - made islands off the coast of Dubai" is also incorrect because the semicolon is misused. The correct way is to use a comma after "space" to introduce the list of features.

Answer:

space, include the